<script type="text/javascript" language="javascript">
  $( "a[name='btn_menu']" ).click( function ( event ) {
    event.preventDefault();
    var request = $.ajax({
        url: $( this ).attr( "href" ),
        type: "GET",
        dataType: "html"
    });
    request.done( function( msg ) {
      $( "#content" ).html(msg);
    });
    request.fail( function( jqXHR, textStatus ) {
      alert( "Request failed: " + textStatus );
    });
  });
</script>
